.banner{
	display: block;
	height: 550px;
	background: url('../img/product.png') no-repeat center;
}
.content{
	width: 1100px;

	margin: 0 auto;
}

.product{
	height: 620px;

}
.product li {
	width: 310px;
	height: 260px;
	margin: 40px 0 0 40px;
	float: left;
	background: #e5e5e5;
	position: relative;
}
.product li:first-child{
	margin-left: 0;
}
.product li:nth-child(4){
	margin-left: 0;
}
.product li a{
	display: block;
	padding-top: 1px;
	width: 310px;
	height: 259px;
}
.product li img{
	display: block;
	margin: 0 auto;
	margin-top: 40px;
	height: 180px;
}
.product li span{
	position: absolute;
	color: gray;
	left: 230px;
	top: 230px;
}
.product li p{
	position: absolute;
	display: none;
	color: white;
	left: 110px;
	top: 110px;
	visibility: 50%;
}
.product li a:hover{
background: #b7b7b7
}
.product li a:hover p{
	color: white;
	display: block;
}
.product li a:hover img{
	opacity: 0.5;
}
